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首页> 外文学位 >Characterization of individual aquatic suspended particles using electron probe x-ray micro-analysis and scanning transmission electron microscopy.
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Characterization of individual aquatic suspended particles using electron probe x-ray micro-analysis and scanning transmission electron microscopy.

机译：使用电子探针X射线显微分析和扫描透射电子显微镜对单个水悬浮颗粒进行表征。

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摘要

Electron probe X-ray micro analysis (EPXMA) and scanning transmission electron microscopy-selected area electron diffraction combined with energy dispersive X-ray detection (STEM-EDX-SAED) have been used to characterize individual suspended particles collected in the Southern Bight of the North Sea, Lake Baikal, the Kara Sea and in rainwater from above the North Sea. All samples were dominated by mineral and biogenic particles and aluminosilicate, Si-rich and Ca-rich particles in particular. In the suspension collected from the rainwater also large abundances of organic particles have been detected. The organic content of the particles was studied by staining some samples with ruthenium tetroxide. This staining has proven that in natural waters all suspended particles have a coating of organic material, but it also indicated that the concentration of organic particles is small in the Southern Bight of the North Sea and that without staining most organic, but also aluminosilicate and trace metal rich particles, were overlooked and thus not included in the analyses. The analyses also showed the presence of small concentrations of anthropogenic particles, mostly trace metal rich particles but also Ti-rich particles, in the majority of the samples. The anthropogenic nature of these Ti-rich particles was proven using STEM-EDX-SAED.
机译：电子探针X射线显微分析（EPXMA）和扫描透射电子显微镜选择区域电子衍射结合能量色散X射线检测（STEM-EDX-SAED）已用于表征收集在南湾的单个悬浮颗粒北海，贝加尔湖，卡拉海以及北海上方的雨水。所有样品均以矿物和生物成因颗粒，尤其是铝硅酸盐，富含硅和富含钙的颗粒为主。在从雨水收集的悬浮液中，还检测到大量的有机颗粒。通过用四氧化钌对一些样品进行染色来研究颗粒的有机含量。这种染色已证明在天然水中所有悬浮颗粒均具有有机物质涂层，但也表明在北海南部海岸线上有机颗粒的浓度很小，并且没有对大多数有机物，铝硅酸盐和微量痕迹进行染色。富含金属的颗粒被忽略，因此不包括在分析中。分析还表明，大多数样品中都存在少量人为颗粒，大部分为痕量金属富集颗粒，但也富含钛。使用STEM-EDX-SAED证明了这些富钛颗粒的人为特性。

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  • 作者

    Jambers, Wendy.;

  • 作者单位

    Universitaire Instelling Antwerpen (Belgium).;

  • 授予单位 Universitaire Instelling Antwerpen (Belgium).;
  • 学科 Chemistry Analytical.;Environmental Sciences.
  • 学位 Ph.D.
  • 年度 1997
  • 页码 157 p.
  • 总页数 157
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 各国文学;
  • 关键词

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